Pneumatic renovator.



,241. PAHTMJTED AUG, Hh MWI J., S THURIVINL PNEUMAT'U RENOVATR,.aPPLUMIoN Hmm mam, 1904.

2 :zHEETss111-Jm 1.

No, 'm7, .71.

J'. THRMAN.. PNEUMAT RENOVATR.

APPLICATION FILED MAR. 24:, 1901.1.

uw m w mh MT W am m Lm 0 J UNlT UFFICE.

WNEtliNlrlTlG HENVATOH.

Specification of Letters Patent.

Patented Aug. 15, 1905.

Application filed March 241, 1904. Serial No. 199,760.

To (LU, whom, it nbwy/ concern,.-

Be it known that l, JOHN 5. THURMAN, a citizen of the llnited States,residing at the city ot St. Louis, in the State of ltlissouri, haveinvented a certain new and useful Pneumatic lenovator, of which thefollowing is such a full, clear, and exact descriptiol'i as will enableany one skilled in the art to which it appertains to make and use thesame, reference being had to the accomlmnying drawings, forming part ofthis specification.

lly invention relates to pneumaticI renovators, and more particularly tothat class ol renovators consisting of a casing provided with an inletin the bottom in combination with a blast-nozzle adapted to discharge ajet of air into or through the article to be cleaned and thence intosaid opening.

My invention consists in various novel features and details oi'construction, all of which are described in the following specificationand pointed out in the claims aliixed hereto.

In the accompanying drawings, which illustrate two terms of renovator.made in aecord ance with my invention, Figure 1 is a vertical centralsection. l 1 ig. 2 is a section on the line 2 2 of Fig. 1. Fig. 3 is anenlarged section of the hand-grip- Fig. 4 is a sectional view showingthe manner of forming one of the blast-nozzles. Figy is a sideelevation, on a reduced scale, showing the complete renovator with thebag attached. liig. (l is a top plan view oi the parts shown in Fig. 5,the dust-chamber and bag being removed.

Fig. 7 is a section on the line 7 T oli` Fig. 3. Fig. e is a section onthe line t; t4 ol Fig. il. Fig.. E) is-partly a section and partly aside elevation oi" a moditied 'lorm of' renovator, and Fig. 1t) is asection on the line 10 1() oi lFig. 9.

Like marks of reference refer to similar parts in the several views ofthe drawings.

lte'l'erring 'lirst to Figs. l to 7, inclusive, which illustrate a iormof renovator more particularly adapted for renovating carpets, 15 is thecasing or body oi the renovator. The bottom of the casing .15 is adaptedto rest Aupon the carpet or other article to be' cleaned, and saidbottomis provided with a pair of mlet-openmgs 1G. Adjacent to theinlet-openings 1G are the blast-nozzles 17.

These nozzles are adapted to discharge com-` pressed air at an angle tothe lower 'lace of the renovator and' into and through the care petorother article to be renovated and thenceV up `through the. inlet 16 tothe interior of the casing 15. The blast-nozzles 17 are partly formed bya wall or partition 12%, extending across the casing 15, and partly by aremovable block or casting 19, which is secured to this wall orpartition 18,' as shown in Figs. 1 and 2. In each of the blastnozzles17, adjacent to the outlet thereof and in the air-passage, are a numberof spreading-posts 20. (Best sl1owninFig4.) These spreading posts 20 arecuneate 1n form and have their apices alternately disposed toward theinlet and the outlet of the nozzle, as shown .in this figure, so as tothoroughly distribute the air along the nozzle 17, and thus secureuniform pressure throughout the length ofthe nozzle. rllhe block orcasting 19 is secured to the casing 15 by means of bolts or screws 70.In order to separate the blockslightly Jfrom the partition 18, againstwhich it rests, I interposc between the said parts athin strip 71 ofpaper or other similar material, and thus regulate the size of themouths 17 .of theblastnozzle. The admission of air to one or the otherof the nozzles 17 is controlled by means Thls valve is preterablysurrounded by a bushing 22, 1n which of a cylindrical valve 21.

the said valve works; The bushing .22 is providedwith passages23,communicating with the nozzles 17, and also with passages 2e/t,communicating with a cross-passage 25. The ends of this passage 25extend along the ends oli the renovator and connect with a common inlet26, to which is secured `one end oi a short llexible'. tube 27. Adjacentto the flexible tube 27 is a second ilexible tube 22%, which leads to aninternal blast nozzle or jet L29, Fig.' 1., which is centrallylocated ina short dischargdpipe 30, threaded in and extending upwardly a shortdistance from the out-let of the casing 15. The ends of the valve 21 areprovided with armsBZ, to which are pivoted the biturca'ted ends 33 ofthe handle. ,The movement of the arms 32 is limited by lugs Sli,arranged at one or both ends of the casing 15. ltlxtending from thebilurcated ends 3? ot the handle are a. pairof pipes 215 and 3G,respectively, which form the shaft ol" the ham die. The pipe 35 isconnected to the flexible tube 27, hereinbel'ore described, and the pipeSiti is connected to the? llexible tube 2&5. Se cured to the ends of thepipes 51.3 and Bois the grip 117,1iorming the upper end ot the handle.ySecured to the lower en'd olfV the grip 37 is allexible pipe 3H,whiclrsupplies the compressed air to the renovator. rlhis pipeltl opensinto a chamber 159, provided with `two outlets.

'lhese outlets are normally closed by means of valves 4() and 41,respectively, Fig. 7. Leading from the valve 40 to the end ofthe pipe isa passage 42, and leading from the valve 41 to the end of the pipe 36 isa passage The valve is controlled bv a fingerpiece 44, arranged at theback of the grip 37. The linger-piece 44 is pivoted to the grip at 47and bears upon the end of the stem of the valve 4t), so as to operatethe said valve against the pressure of the spring 46. The

valve 41 is controlled by a similar fingen piece in the loop of the grip37. The finger-piece 45 is pivoted at 46 and bears against the end ofthe stem of the valve 41, so as to operate said valve against the spring46. is the dust-collecting chamber, which is preferably cylindrical inform and preferably made of sheet metal. an opening in its bottom ofsubstantially the same diameter as the short pipe 33t), extendingupwardly from the casing 15, and secured to the upper face of the bottomis a short tube 51, adapted to fit the said pipe 30. or tube 51 is alsoprovided with an extension 52, threaded into its upper end. Theextension 52 is closed at its u )per end by means of a globular valve53. This valve is prevent-ed from dis lacement by means of a wire cage54, whic Yis preferably made separable from the tube or pipe 52. Thetube or pipe 52 nts against the end of the discharge-pipe 30, as clearlyshown in Fig. 1, so as to make a flush joint with it, and thus allow noplace for the escape or lodgment of dust. The upper edge of thedust-chamber is provided with a turned-over edge or roll 55, by means ofwhich the bag 56, of cloth or other foraminous material, is secured inplace. In order to hold the bag distendcd, the chamber 5() is providedwith a. clamping device 57, in which is secured a rod 5S, correspondingto the contour of the bag and to which the bag is secured at severalpoints, as shown in Fig. 5. Owing to the construction above described,the dustchamber 50, together with the bag 56, can be lifted off of therenovator when they become dirty and replaced by a clean dust-chamberand bag, as the parts simply slip over the short discharge pipe or tube30.

In Figs. S and 9 I have shown a modified form of my apparatus which isespecially adapted for cleaning furniture. In this device in place ofthe casing 15 I use a casing 60, having but a single inlet-opening inits bottom. 61 is the blast-nozzle, which discharges the air into andthrough the material to be cleaned and thence into the opening 62 in thebottom of the casing 60. In this form of apparatus the casing is notprovided with a dust-chamber or dust-collecting bag, but the air passesout through a pipe 64,- which in turn conm'lunicates with a flexiblepipe 65, leading either to a stationary dustcollector (not sho-wn) or toany suitable The chamber 50 has The pipe place where the dust is to bedischarged.

The grip 37 is the same as that previously :described in connection withthe form of i renovator shown in Figs. 1 and 6 and need not be againparticularly described. The pipe 35 of the -handle leads to theblast-nozzle 61 through a passage 72, formed in the, g casing 60. Thepipe 36 leads to the internal l nozzle or jet 63 through a passage 73,formed l. in the casing 60. The nozzle 61 s formed E partly by the rearwall ofthe casing and l partly by a removable portion 74, secured lagainst the said rear wall by means of screws or bolts 75. These screwsor bolts pass I through spreading-posts 76, formed in the passage of thenozzle 61. The spreadingposts 76 are similar to the spreading-posts 20,hereinbefore described.

In the operation of my renovator the casing 15 is moved over the carpetor other article to be cleaned in either direction by means of the grip37. When the renovator is moved f forward, the action of the bifurcatedends 33 on the arms 32 moves the valve 21 in osition to dischargethrough the forward b astnozzle 17, the movement of the arms beinglimited by the stops 34. When the casing is moved backward, the arms arethrust against the opposite stops 34, so as to throw the valve inposition to discharge through one or the other nozzle, so that it alwaysissues in the direction in which the renovator is traveling. Bymeans ofthe finger-pieces 44 and 45 a erfect control is had over the admission oair to both the blast-nozzle and the internal nozzle or jet 29. Theaction of the compressed air rebounding from the surface to be cleanedforces the air up through the outlet-pipes 30 and 52 to thedust-collecting chamber 50. This action can also be increased byadmitting air through the internal nozzle or jet 29 by means of thetingerpiece 45. Once the chamber 50 becomes filled with dust or theforaminous bag becomes clogged the chamber and bag can be togetherremoved from the renovator, as hereinbefore described, and a new chamberand bag substituted.

The operation of the renovatior shown in Figs. 8 and 9 is similar tothat above described except that the renovator is intended to always bemoved in a forward direction. The valves in the grip 37 give perfectcontrol over the admission of air both to the blastnozzle and to theinternal jet.

Having fully described my invention,what I claim as new, and desire tosecure by Letters Patent of the United States, is-

1. In a pneumatic renovator, the'combination with a casing, of ablast-nozzle, a removable dust-chamber carried by said casing androvided with' an opening in its. bottom for tfie dust-laden air fromsaid casing, and means for reventing the return of the dustladen air romsaid dust-chamber to said casing.

2. ln a, neuniatie renovetor, the eombi nation witlli a Gesine, of eblast-nozzle, a 1e movable dust-cham e1' eai'iied by said casing andprovided with an opening in its bottom foi' the dust-1aden air from seidcasing, a eonduit carried by said dust-chamber and eX- tendingr upwardlyfrom seid opening, and a valve for closing said conduit.

ln a Pneumatic renovator, the combi nation wit 1 a Casing provided withs blastnozzle, of' a tube carried by said casing, a dust-Chamberslidingly mounted on said tube, .and a. valve for Controlling thecommunica lion between said tube and dust-chamber.

4. ln a meumatie renovatol-, the combination witli a easing providedwith e blastnozzle, of a tube eerried by said easing, e dust-elmmbelslidinglyinounted on seid tube,

and e Valve foi' controlling the communicetion between seid tube anddust-chamber, said valve bein carried by und removable with said dusteiember.

ln a, Pneumatic renovetor, the combi.- netion with s easing providedwith e` blastnozzle7 of a tube carried by said easing, e dust-ebamberhavine; au lm'fndly-projeetinC tube adapted to slide over saidfirst-named tube and project above it, and e valve can ried by saidsecond-named tube.

In testimony whereof i have hereunto set my hand and aiiixed my seul inthe pl'esenee of the two subscribing witnesses.

JUHN S. THUHBL/tblc EL. S.]

Witnesses:

JAMES H., Beeson, D. C. BETJEMAN.

